Revert "pvmfw: Use the Android Prebuilt Drop tool"

Revert submission 1966567-pvmfw-asciipb

Reason for revert: Build breakages (bug 217251711)
Reverted Changes:
I4f58f46d0:pvmfw: Use the Android Prebuilt Drop tool
I96ea138b8:pvmfw: Remove pre-built

Bug: 199717422
Bug: 217251711
Change-Id: Ia71edaf56d9b2e3faab259d145b86fcb5a3d84f7
diff --git a/.prebuilt_info/pvmfw.asciipb b/.prebuilt_info/pvmfw.asciipb
deleted file mode 100644
index 4199b2b..0000000
--- a/.prebuilt_info/pvmfw.asciipb
+++ /dev/null
@@ -1,12 +0,0 @@
-drops {
-  android_build_drop {
-    build_id: "8134799"
-    target: "u-boot_pvmfw"
-    source_file: "pvmfw.img"
-  }
-  dest_file: "pvmfw/pvmfw.img"
-  version: ""
-  version_group: ""
-  git_project: "platform/packages/modules/Virtualization"
-  git_branch: "master"
-}